1. Quit Mathematica if it is running. Click the name of the file that you want to install.

2. The “Download file” window will appear. Click Salva to continue.

3. The “Salva con nome” window will appear. Choose a download location, and click Salva to continue.

4. When the download is complete, double-click on the file icon to uncompress the file and launch the installer.

5. The “Programma di installazione” window will appear. Click Avanti to continue.

6. If you have sufficient permissions on your computer, the “Opzioni di installazione” window will appear. Use the default setting to install for all users or choose to install for yourself only. Click Avanti to continue.

7. The “Scegli percorso di destinazione” window will appear. The default installation directory is shown to the left of the Sfoglia button.
Note: The installation directory must be the Mathematica top directory. The installer assumes that Mathematica has been installed to the default location Programmi\Wolfram Research\Mathematica\5.0. If you installed Mathematica to a different location, click Sfoglia and navigate to your Mathematica installation, and then click OK. 
 If you are uncertain of the Mathematica installation location, launch Mathematica and evaluate $InstallationDirectory. The output will be the Mathematica top directory.  Quit Mathematica. Click Sfoglia and point the installer to the Mathematica location.
Click Avanti to continue.

8. The “Inizia la copia dei file” window will appear. Click Indietro to review or modify the installation settings. Click Avanti to continue.

9. The “Installazione completata” window will appear when the installation is complete. Click Fine to quit the installer.

10. If you are working on an Italian operating system, the language kit will be loaded automatically the next time you start Mathematica. If you have an English operating system, start Mathematica and choose Edit ⊳ Language ⊳ Italian from the menu. A dialog box asking you to quit and restart the Mathematica front end will appear.  The Italian Language Kit will be loaded automatically when Mathematica is restarted.